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A015086 q-Catalan numbers (recurrence version) for q=5. 0
1, 1, 6, 161, 20466, 12833546, 40130703276, 627122621447281, 48995209411107768186, 19138851672289046707772366, 37380607950584029444762130426196 (list; graph; refs; listen; history; internal format)
OFFSET

1,3

FORMULA

a(n) = sum_{i=1}^{n-1} q^{(i-1)} a(i) a(n-i).

CROSSREFS

Sequence in context: A030449 A120277 A193370 * A052466 A078535 A177781

Adjacent sequences:  A015083 A015084 A015085 * A015087 A015088 A015089

KEYWORD

nonn

AUTHOR

Olivier Gerard (olivier.gerard(AT)gmail.com)

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Last modified February 16 01:31 EST 2012. Contains 205860 sequences.